Railway frog



Feb. 28, 1928. 4

' 1,660,694 F. M. VOLK RAILWAY FROG Filed June 27. 1927 INVENTO TTORNEYS.v I

Patented Feb. 28, 1928,

NEE-1 I RAILWAY FROG.

Application filed June 27, 1927; Serial No. 201,721.

This invention relates to railway equipment, and particularly pertains to rail frogs used at rail intersections.

Prior to my invention guardrails were employed to prevent the wheel flanges from colliding with the frog point when passing the gap between the rail-and the frog. These guard rails were comparatively expensive to construct and maintain and, therefore, 1t 1s the principal object of the present mvention to generally simplify the construction of rail frogs by eliminating these guard rails and substituting simple and inexpensive means for preventing the wheel flanges from contacting with the frog point when passing the gap between the rail and the frog point.

In carrying the invention into P12010108. I offset the converging main and turn-out rails at a point contiguous to the frog point in a manner to guide the wheel out of substantial alignment with the point so that it may pass the latter without colliding therewith and provide means whereby the wheels will be properly aligned with the rails as the intersection is crossed.

One form which the invention may assume is exemplified in the following description and illustrated in the accompanying drawing, in which:

The figure is a View in plan of a rail frog, disclosing the preferred embodiment of the invention.

Referring more particularly to the accompanying drawing, 10 indicates a railway bed, including the usual ties 11.

these ties is a pair of main rails 12 and a pair of turn-out rails 14. One of the main rails and one of the turn-out rails converge toward a frog point 15. Each of these rails, at a point contiguous to the frog point, is formed-with an 'ofl-set 16. It should be stated that the side faces ofthe frog are in alignment with the adjacent side faces of the converging main and turn-out rails. The offsets 16 occur in the main and turnout rails at a point contiguous to the frog point and extend outwardly beyond the plane in which the aligned faces of the frog point and rails lie. The purpose of these offsets is to guide the flanges of the wheels out of substantial alignment with the frog point so they will not collide with the point.

Mounted on- It is common practice in railway construction of the present type to gradually curve therconverging rails, of the track. This causes an irregularmovement of the wheels as they move along the rails, due to thefact' that the wheels are fixed upon a rigid axle and that the wheels are traversing curv-esof different arc. In the present invention it is desired to cause the wheels to be aligned Y with the cross-over before reaching the same, and for that reason the section of the.

rails extending from the point a to the point Z), as indicated on the drawing, are straightened so that the wheels will be moving in a straight path oftravel as they cross the intersection, and will thus'be moving naturally and without any irregular or umpmg motlon.

Reference being had to the drawing, it y will be seen that a wheel 17, representing the railway car Wheel, is disposed onthe turn-out track.- Assuming that this wheel is traveling in the direction indicated by the I arrow, the moment its flange engages the offset it Will be moved out of alignment" with the face of the frog "and will not contact with the point of the frog.

While I have shown the preferred form of my invention, it is to be understood that various changes inits construction may be made without departing from the spirit of the invention as defined in the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. In a structure of the character de-. scribed including converging main and turnout rails and a frogpoint, guide means on the main and turn-out rails at a point contiguous to the frog point,vsaidfguide' meansextending outwardly from the rails beyond the planes in whichthe aligned faces of the rails and frog point lie to guide the flange of a wheel passing thereover out of substantial alignment with the point of the frog" and to guide it past the same.

2. In a structure of the character described including converging main and turn-' out rails and a frog.po1nt, ofl'sets in said rails contiguous to said frog point, said offsets extending beyond the planes in which the aligned faces of the rails and frog point lie to guide the flange of a Wheel passing rail at a point contiguous to the frog and exover the rails out of substantial alignment tending outwardly from the plane in Which 10 With the frog point and to guide it past the the aligned faces of the rail and frog lie same. H I for guiding a Wheel passing over the rail 57 3.' In a structure of the character de out of substantial alignment With the point scribed including a rail and a frog point, of the frogancl prevent the flange thereof one face of the rail being in alignment with from contacting with the "point of the frog. oneiface of the frog pointymeans on said i FRANCIS .M. VOLK. 

